Saw-guard



No Model.)

J. G GROPF.

SAW GUARD.

Patented Oct. 28, 1884.

1A VJI/V' T OR .m W 6 I AN V WITAESSL'S i t pr .v i H t llllll I Unmet)'"rnfrns ATENT Fries.

JOSEPH G. GEOFF, OF CONN ERSVILLE, IND., ASSIGNOR TO THE GEOFF & BEN-NETT SAW GUARD MANUFACTURING CO., OF CINCINNATI, OHIO.

SAW-GUARD.

EjPlBGIZ-ICAIION forming part of Letters Patent No. 307,112, datedOctober 28, 1884.

Application filed April 14, 1884. (No model.)

To all whom it may concern.-

Be it known that I, JOSEPH G.GROFF, of Connersville, in the county ofFayette and State of Indiana, have invented certain new and usefulImprovements in Saw-Guards; and I do here by declare the following to bea full, clear, and exact description of the same, reference being had tothe accompanying drawings, forming a part of this specification, and tothe figures and letters of reference marked thereon.

This invention relates to that class of saw guards which are automaticin their action, rising upon the approach of the material to be sawed,resting upon the material while being sawed, and descending againintonormal position after the material has passed from under it, and itsnovelty consists in certain features of construction, which I will firstdescribe, and then point out particularly in the claims at the end ofthis specification.

In the accompanying drawings, Figure 1 represents a side elevation of asaw-guard containing my improvements, parts of the device being shown insection. Fig. 2 is a top plan view of thebed-plate; Fig. 3, a View ofamodication of the means for maintaining the hood in the proper relationlaterally to the saw. Fig. is a detail sectional view taken on the lineas m, Fig. 1.

Similar letters of reference in the several figures indicate the sameparts.

The letter A indicates the main frame of the hood proper, and B thesides of the same, provided with the inclines U and W at the bottom, asshown in Fig. 1.

D represents arms secured to the hood proper and extending rearwardly;and C, an upwardly-inclined arm or projection at the front of thehood,whieh serves as the means for raising the hood by the advancingmaterial. The rearward-extending arms Dembraee a vertical plate, F,which is supported in a suitable socket formed upon or pendant from abedplate, 1%, arranged upon 'the saw table, as shown in Figs. 1 and 2.This plate F is preferably provided with two vertical slots, 8 s, inwhich work cross pins (1 g, which pass through and are carried by theupper and lower arms, D D. The lower arms, D, are

provided with elongated horizontal slots 8, and the lower pin, q, has aplay within the same sufficient to permit the hood proper and itsconnections to turn or pivot upon the upper cross pin or roller, q, as acenter.

In addition to the slots 8 s, the plate F is further provided withapertures (2', arranged in a vertical series, as shown in Fig. 1, andinto these apertures is adapted to fit akey, T, having a wing, it,projecting at right angles to its body, as shown in Fig. 4.

The normal height of the hood above the table is determined bysecuringthe key in one or the other of the series of apertures d in the blade Fbelow the upper arm, B, as shown in Fig. 1, and to so secure the key itis only necessary that its wing or lug t be turned so as to enter thecorresponding portion of the aperture in the blade, and then, after thekey is shoved in, that it be turned so as to cause the said wing or lugto engage with the blade and prevent the withdrawal of the key.

The base-plate R, though it may be made in several sections, ispreferably made in one continuous piece with a recess, a, at the rearfor accommodating the shank of the plate F with a central slot, b,for-aecommodating the saw, and with a forward slot, 0, for accommodatinga hinged or pivoted latch, E, which will be further on described. Thesaid baseplate is further provided at its rear, and adjacent to therecess a,with a depending plate,

a, made either solid or with an opening in it, as shown in dotted lines,Fig.1, and provided with a series of projecting lugs or fingers, l, orwith headed pins or studs Z, or with both of these contrivances, andconstituting the socket for receiving and holding the shank of the bladeF. IVhen the lugs or fingers Z only are used in connection with theplate 0, the shank of the blade F is slipped down between said plate andlugs and confined between them, as'will be readily understood byreference to Figs. 1 and 2; \Vhen the headed pins Z are used, eitherseparately or in connection with the plate R, the lower end of the shankof the blade F is preferably slotted, as shown in Fig. 1, to receivesaid pins, the heads of the pins on the one side, with or without thelugs L,

' front of thehood.

and the plate R on the other side serving to I catch attached either tothe hood or bed-plate keep the blade in position.

In the forward slot, 0, of the bed-plate, and preferably to dependinglugs L, formed upon or secured to the bed-plate, is pivoted a latch, E,by means of pivots l ,which have hearings in the said depending lugs L.The lower portion of this latch is made heavier than the upper portion,so as to keep it normally hung in vertical position, as shown in Fig. 1,and its upper portion projects above the top of the saw-table and intoor through a slot in the npward1y-inclined arm or projection O on the Asthe material is advanced to the saw it strikes the latch and turns itinto a horizontal position, as shown in dotted lines, Fig. 1, and itthere remains until the material passes completely by, when itautomatically resumes its normal vertical position with its upper endprojecting into the slot of the up turned arm (l and securing the hoodin its proper position and against accidental lateral displacement.

The latch may be of any suitable width, and is preferably of a thicknessequal to that of the vertical blade F. Both it and said blade being indirect line with the vertical face of the saw, form reliable points fromwhich to measure for the purpose of adjusting the guide on the sawtablcwithout exposing the saw or removing the hood. Another reliable indicator of the position of the saw is afforded by the provision of aforward extension or point,

0, on the bed-plate R, as shown in Fig. 2.

This, as well as the latch and the vertical blade F, are in line withthe saw and with each other, and the uncovering of the saw for thepurpose of adjusting the guide is therefore rendered still moreunnecessary.

i The pivots upon which the latch turns are p eferably f orm ed upon orseen red to the latch, and the lugsZ are provided with open bearings forsaid pivots, so as to permit of the insertion or removal of the latchwhen desired.

Instead of pivoting the latch to the bed plate, as shown in Fig. 1, itmay be pivoted within a slot in the upturned arm or projectionC at thefront of the hood in such manner as to swing into and out of a slot inthe bedplate, as shown in Fig. 8.

As previously stated, the bed-plate may be made in two or more sections,if desired; but when it is made in a single piece, I preferablyconstruct it with a depending flange, extending down from the point atto the point a, as shown in Fig. 2, or for a less distance, for thepurpose of giving additional strength to the bed-plate.

The general operation of the guard as a whole does not difl'er from thatof guards now in use and shown in my previous patents, and hence neednot be here detailed.

I claim as my invention 1. 111 a saw-guard, and in combination with itshood and the bed plate or table, a latch or and engaging positively boththe hood and the bed plate or table to prevent the lateral displacementof the hood.

2. The combination, wit-h a saw guard or hood having therearwardly-extended arms, of the vertical blade having the series ofapertures, and the locking-key adapted to be in serted in one or theother of said apertures, and to be locked therein, substantially as described.

3. The combination, with the sawguard having the rearwardly-extendedarms, of the vertical blade having the series of apertures and the keyhaving the wing or lug, and adapted to be secured in one or the other ofsaid apertures by being passed through the same and turned,substantially as described.

at. In a saw hood or guard, the socket consisting of a single dependingplate and the lugs or lingers thereon, in combination with the shank ofthe vertical blade, substantially as described.

5. In a saw need or guard, the combination, with the bed-plate, ot' thesingle depending plate, its lugs, and the headed pins or studs and thevertical blade having the slotted shank, substantially as described.

(3. In a saw hood or guard, the bed-plate having the socket-reccss, thesocket composed of the depending plate and the lugs, and having theslots for the saw and latch, respectively, and terminating at the frontin an extension or point, substantially as shown and described.

7. In asaw-guard, and in combination therewith and with the bed plate ortable, an auto matic latch attached either to the hood or bedplate,which yields to the advancing material but normally engages with thebed-plate and guard to prevent the lateral displacement of the latter,substantially as described.

8. In a saw-guard, and in combination with its hood and bed plate ortable, a hinged or pivoted latch attached either to the hood orbed-plate, for locking the hood against lateral displacement,substantially as described.

9. In the herein-described saw-guard, the combination of the hood havingthe rearwardly-extended arms, with the vertical blade to which the hoodis hinged, and the hinged 'or pivoted latch cooperating with slots inthe bed-plate and the hood in the manner described, and arranged in linewith the vertical blade, substantially as described, for the purposespecified.

10. The combination, with the bed-plate, ot' the hinged or pivoted latcharranged within the slot of the bed-plate, as described, and the slottedforward projection of the sawguard, substantially as described.

JOSEPH G. GEOFF.

\Yitnesses:

G. O. FLOREA, Jenn XV. CURRY.

IIO

